diff options
Diffstat (limited to 'util/grub-gen-widthspec.c')
| -rw-r--r-- | util/grub-gen-widthspec.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/util/grub-gen-widthspec.c b/util/grub-gen-widthspec.c new file mode 100644 index 0000000..33bc8cb --- /dev/null +++ b/util/grub-gen-widthspec.c @@ -0,0 +1,153 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2009,2010 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <errno.h> + +#include <ft2build.h> +#include FT_FREETYPE_H +#include FT_TRUETYPE_TAGS_H +#include FT_TRUETYPE_TABLES_H +#include FT_SYNTHESIS_H + +#undef __FTERRORS_H__ +#define FT_ERROR_START_LIST const char *ft_errmsgs[] = { +#define FT_ERRORDEF(e, v, s) [e] = s, +#define FT_ERROR_END_LIST }; +#include FT_ERRORS_H + +#define GRUB_FONT_DEFAULT_SIZE 16 + +#define ARRAY_SIZE(array) (sizeof (array) / sizeof (array[0])) + +#define MAX_CODE 65536 +static unsigned char result[MAX_CODE / 8]; + +static void +add_glyph (FT_Face face, + unsigned int char_code) +{ + int flag = FT_LOAD_RENDER | FT_LOAD_MONOCHROME; + FT_Error err; + FT_UInt glyph_idx; + + glyph_idx = FT_Get_Char_Index (face, char_code); + if (!glyph_idx) + return; + + err = FT_Load_Glyph (face, glyph_idx, flag); + if (err) + { + printf ("Freetype Error %d loading glyph 0x%x for U+0x%x", + err, glyph_idx, char_code); + + if (err > 0 && err < (signed) ARRAY_SIZE (ft_errmsgs)) + printf (": %s\n", ft_errmsgs[err]); + else + printf ("\n"); + return; + } + + if (face->glyph->bitmap.width > 12 && char_code < MAX_CODE) + result[char_code >> 3] |= (1 << (char_code & 7)); +} + +int +main (int argc, char *argv[]) +{ + FT_Library ft_lib; + FILE *file; + int i; + + if (argc != 3) + { + fprintf (stderr, "grub-gen-widthspec: usage: INPUT OUTPUT"); + return 1; + } + + if (FT_Init_FreeType (&ft_lib)) + { + fprintf (stderr, "grub-gen-widthspec: error: FT_Init_FreeType fails"); + return 1; + } + + { + FT_Face ft_face; + int size; + FT_Error err; + unsigned int char_code, glyph_index; + + err = FT_New_Face (ft_lib, argv[1], 0, &ft_face); + if (err) + { + fprintf (stderr, "can't open file %s, index %d: error %d", + argv[1], 0, err); + if (err > 0 && err < (signed) ARRAY_SIZE (ft_errmsgs)) + fprintf (stderr, ": %s\n", ft_errmsgs[err]); + else + fprintf (stderr, "\n"); + + return 1; + } + + if ((ft_face->face_flags & FT_FACE_FLAG_SCALABLE) || + (! ft_face->num_fixed_sizes)) + size = GRUB_FONT_DEFAULT_SIZE; + else + size = ft_face->available_sizes[0].height; + + if (FT_Set_Pixel_Sizes (ft_face, size, size)) + { + fprintf (stderr, "grub-gen-widthspec: error: can't set %dx%d font size", size, size); + return 1; + } + + for (char_code = FT_Get_First_Char (ft_face, &glyph_index); + glyph_index; + char_code = FT_Get_Next_Char (ft_face, char_code, &glyph_index)) + add_glyph (ft_face, char_code); + + FT_Done_Face (ft_face); + } + + FT_Done_FreeType (ft_lib); + + file = fopen (argv[2], "w"); + if (! file) + { + fprintf (stderr, "grub-gen-asciih: error: cannot write to `%s': %s", argv[2], + strerror (errno)); + return 1; + } + + fprintf (file, "/* THIS CHUNK OF BYTES IS AUTOMATICALLY GENERATED */\n"); + fprintf (file, "unsigned char widthspec[] =\n"); + fprintf (file, "{\n"); + + for (i = 0; i < MAX_CODE / 8; i++) + fprintf (file, "0x%02x,%c", result[i], ((i & 0xf) == 0xf) ? '\n' : ' '); + + fprintf (file, "};\n"); + + fclose (file); + + return 0; +} |